Connecting rod



Dec.. 30, 19,30. B, B. BmGGs 1,786,934

commune non Fned April 29, 1m

7 /Nl/ENTOR rggf,

ATTO //VEX' Patented Dec. 30, 1930 Bunnnm'r n. names, or cHrcAeo, rumors CONNECTING' ROD Application tiled April 29,

This invention relates to certain improvements in connecting rods more particularly to a device of this kind especially designed and adapted for use with a crankshaft and a piston wrist pin asis used in automotive internal combustion engines, and it is an object of the invention to provide an adjustable bearing on the wrist pin end of the connecting rod, whereby wear from time to' time '1Q may b e readily taken up without replacing t worn parts with new. l Another object of the invention is to prot vide a novel arrangement of the connecting rod inl connectionwith a crankshaftv which is offset out of center line of the piston, for

which I have offset the connecting rod housing containing the crankshaft bearing for the rod to a corresponding offset of the piston andcrankshaft,.so as to give an equal throw or movement between the walls of the piston, thereby providing a connecting rod of greaterstrength less liable to bend or break and adapted to a higher speed of' the engine and a more perfect balance and reduction of strain upon the wrist pin bearing. Another object of the invention is to provide an improved and eiicient means for securing the connecting rod and bearing to they crankshaft.

Y With the above and other objects in view as will be hereafter apparent the invention consists in certain novel details of construction and combination of the several parts of m improved vconnecting rod whereby certain important advantages are attained, and the deviceA` rendered simpler, less expensive v:and otherwise more -Iconvenient for use, -as hereinafter described and specifically claimed.

' In order that my invention maybe the better understood now proceedto describe the same withreference to the aecomanyin' g drawm' -gs like characters of refernceindicating like parts vin the several views, whereinr:. Y Y

Figure 1 is a view in elevation of a piston and crankshaft, the piston being partly broken away and the crankshaft shown in section tok disclose the improved arrangement .5 of @,.QQnIplecting vrod applied thereto con- .the piston and wrist pin end of rod in sec- Vholds the bushing rigid within the housing .more perfectly in itting'the` bushing npon 1926. Serial No. 105,605.

structed in vaccordance with an embodiment of my invention. I Figure 2 is a vertical view of the connecting rod, crankshaft and piston, and showing,

tional detail.

Figure 3 is a sectional detail on lines 3-3 of Figure 1. f

Figure 4 is a fragmentary view of the lower'end of the connecting rod showing the ,6 0 hinged bushing housing open to receive the bushing.

Figure 5 is a vertical sectional detail ofthe wrist pin bushing. Y

As4 disclosed in the drawings 1 denotes the conventional form of a piston provided with thel customary wrist pin 2 secured inthe bosses la of the piston. 3 denotes the conventional form of a crankshaft. A connecting rod 4 isvprovided at its piston end with l a bushing housing 5, threaded within its bore to receive a threaded bushing 6 provided therefor and fitted on the wrist-pin 2. The bushing 6 is provided with a longitudinal slot 7 on one side thereof. A shim -8 is inserted in the vertical slot 9- in the rod and housingadjacent the bushing and engages in the slot 7 of the bushing and holds the bushing against rotation.. This shim is fitted soas to. have its edge engaging the bushing'- flush with the bore of the bushing and form a continuous bearing between the slot 7 and the boreof the bushing so that there will be no vacant bearing space at this point upon the Wrist pin. A bolt 10 is .inserted trans- I.55 versely through the rod and engages a suit-V able aperture 8a in the shim 8 to clamp' the split portion to the rod and houslng tight upon the sides of the shim and thls bolt also 5. A plurality oftcircumfer'entially spaced grooves 11 are provided on the periphery of the bushing and also circumferentlally spaced grooves 12 are provided within the bore of the bushing and spaced intermediate or alternatel the grooves 11, these alternately spaced grooves inside the bore andV on the peri hery of the bushing allow lthe bushing to easily contracted or expanded 30 plosive force at this point.

the wrist pin. By reducing the thickness of the shim 8 and forcing the split portion of the rod tight to the shim the bearing may be contracted, and by this means it is manifest that this bearing may be easily adjusted for'vr g 'compensating wear without inserting either a new pin or bushing.

The outer ends' of the'grooyes 1l provide A openings whereby a Spanner or kindred tool may be engaged with the bushing forinserting same Within the housing 5 of the rod. The outer ends of the grooves 12 allow oil to enter the grooves and lubricate the coacting bearing around the wrist pin.

Asbestos or felt washers 13, 14: "are provided on the wrist pin between the bosses 1a and the ends of the bushing and housing of the connecting rod for retaining oil for lubrieating the vwrist pin bearing and also to deaden any side slap or clicking sound that might occur'if the bushing and rod should become out of line with the piston-by reason -of expansion of certain parts or by a bent crank shaft or rod as sometimes happens.

The main arm ofthe connecting rod 4 between the bearings is made I-beam shape diverging from the wristpin and to the crankshaft end having the front flange enlarged at its baseer-crankshaft end as at 4a to provide against extra strain caused by the ex- The lower or crankshaft end of the rod 4 is` made av bell crank shape to provide .an oil"- set bushinghousin 15, for securing the rod upon the cranksha As will be observed in Figure 1, the center of the piston is odset to the right of the dead center line of the crankshaft so as to give amore effective downward explosive force upon the crankshaft. To the vhousing forming a part of the rod a coacting half housing 16 is hinged as at 17 by a pin or rivet 18 passing through'the hinge points provided on 15, 16 at a point above the center line of the -housing or at about a forty-'live ,degree angle to the vertical center line of the connecting rod. The free open side of the housing is .provided with the usual lugs 19, 20. Inside of this housing is inserted the two half parts of a bushing 24, 25 and these `parts are clamped upon the crankshaft by a bolt 26 inserted through theV lugs 19, 20, a shim i -21 being inter osed at this point between the up by the lug 2O to beforced into the a erh ture 28 and oil grooves 29 and circulate in gether at the hinged joint of the housing, f

facilitates the fitting of the bearing to the crankshaft, and by jointing the housing at an angle o'n the connecting rod, that the strain upon the hinged ioint and-the bolted open end is greatly reduced, adding increased strength to this important point of the connecting rod.

There has thus been provided a simple and eiicient device of the kind described and for the purpose specified.

Itis obvious that minor changes may be made in the form and construction of the invention without departing from the material spirit thereof. It is not, therefore, desired to confine the invention to the exact form herein shown and described, but it is desired to include all such as properly come within the scope claimed.

Having thus described the invention, what is claimed as new, is':

1. A connecting rod having a rod body and an eye at one end thereof, said eye and body' l having a kerf leading from the eye into said body, means to vforce the sides of the kerf toward each other and thereby contract the eye, a bushing having a slot extending longitudinally thereof and iitting in said eye and provided with circumferentially spaced longitudinal grooves, and a removable and replaceable shim held in said kerf and slot and having an edge coincident with and conforming to the inner surface of the bushing.

2. A connecting rod having a rod body and an eye at one end thereof, said-eye and body having a kerf leading from the eye into said body, means to force the sides of the kerf toward each other and thereby contract the eye, and a bushing having aslot extending longitudinally thereof and fitting in said eye and provided with circumferentially spaced longitudinal grooves, said bushing and eye having screw threaded engagement.

3. A connecting rod having a rod body and an eye at one end thereof, said eye and body having a kerf leading from the eye into said body, means to force the sides of the kerf toward each other and thereby contract the.

eye, a bushing having a slot extending longif tudinally thereof and fitting in said eye and provided with circumferentially' spaced longitudinal grooves, said bushing Aand eye -aving screw threaded engagement, and a removable and replaceable shim held in said gitudinal grooves, anda removable and replaceable shim held in said kerf and slot and I `having' an edge coincident withand conforming to the inner surface of the bushing, the grooves of the bushing being in the inner surface thereof.

5. A connecting rodlliaving a rod body and an eye at one end thereof, said eye and body having a kerf leading from the eye into said body, Ingans to force the sides of the kerf toward each other and thereby contract the eye, abushing having a slot extending longitudinally thereof and fitting in said eye and provided with circumferentially spaced longitudinal grooves, and a remoiable and replaceable shim held in said kerf and slot and having an edge coincident with and conforming to the inner surface of the bushing,-`

the grooves of the bushing being in the inner surface thereof, said bushing and eye having screw threaded engagement.

6. In a connectlng rod, a body, an eye at one end thereof, ,a bushing in said eye and having circumferentially spaced lon 'tudinally extending grooves in its inner an outer surfaces, said bushing also havinga longitudinally extending slot therein, and means and an eyeiat one end thereof, said eye and body having a kerf leading from the eye into saidV body, means to force the sides of the kerf toward each other and thereby contract the eye, a bushing having a"slot extending longitudinally thereof and fittin eye 4and provided with circum erentially spaced longitudinal grooves, and a removable and replaceable shim held in said kerf and4 slot and having an edge coincident with and in said conforming to the inner surface of the bushing, the grooves of the bushing being in thev 12'. In combination, aI piston having internal wrist pin bosses, a wrist pin extendin between said bosses, a connecting rod on sai Wrist pin, and lexible'and shocks 'absorbing' fabric washers mounted on the wristpin between the rod and Isaid bosses. A In testimonywhereof I afiix" my signature. BURDETT B. BRIGGS.

carried by the rod and-engaging the slot to hold' the bushing against rotation in the eye. 7. In a connecting rod, a body, an eye at oneJ end thereof,a bushing in said eye and having circumferentially spaced longitudinall extending grooves in its inner and outer sur aces in staggered, relation, said bushing also having a longitudinally extending slot therein, and means carried by the rod and 'engaging the slot to hold the bushing against rotation in thel eye. n,

8. A connecting rod and an eye at one -end thereof, saideye and body having a kerf leading. from the eye into said body, means to force the sides of the kerf Vtoward each other and thereby contract the eye, a bushing having a'slot extending longitudinally thereof and fitting in said eye and provided with circumferentially spaced longitudinal grooves, anda removable and replaceable shim held in said kerf and slot Aandliaving an edge coincident with and cony forming tothe inner surface of the bushing,

the grooves ofthe bushing ,being inthe inner and outer surfaces thereof andarran'ged in 'stai ered relation.

having a rod body connecting 'rod' a rod body i r1 is 

